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Date: | Tue, 4 Jun 1996 20:39:04 -0700 |
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Dave and Rudy,
It is important to remember that brown oxide by virtue of it's shorter
and much more densely packed crystal strucure has a much greater
surface area than black oxide. Thisprovides the pepreg with many more
bonding sites with which to grab on to thus improving the bond
strengths.
Also I have performed a number of test on the composition of brown and
black oxide coatings. I found that black oxide contains a much greater
proportion of thermally unstable cuprous oxide than does the brown.
During the lamination cycle, the cuprous oxide can decompose forming
oxygen, thus contributing to delamination.
Good luck
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